Commission Delegated Regulation (EU) Nº 918/2012 of 5 July 2012 supplementing Regulation (EU) Nº 236/2012 of the European Parliament and of the Council on short selling and certain aspects of credit default swaps with regard to definitions, the calculation of net short positions, covered sovereign credit default swaps, notification thresholds, liquidity thresholds for suspending restrictions, significant falls in the value of financial instruments and adverse events